基于MODIS的北京地区一次霾过程的能见度反演
投稿时间: 2016-12-22  最后修改时间: 2017-04-01  点此下载全文
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作者单位E-mail
包云轩 南京信息工程大学 baoyunxuan@163.com 
邵艺 南京信息工程大学  
李迅 北京市气象局  
基金项目:公益性行业(气象)科研专项,国家“十二五”科技支撑计划项目,江苏省科技支撑计划,江苏省气象局北极阁基金
中文摘要:为了探明霾天气过程对道路交通的影响,为道路交通气象灾害监测提供技术支持,本文利用MODIS_L1B数据(MOD02_1KM-Collections 6),结合AERONET地面观测与反演的AOD(Aerosol Optical Depth)数据、北京市自动气象站网的能见度观测数据和北京市道面交通气象监测网的能见度观测数据,选取2012年3月6日至11日期间发生在北京市的一次重大霾天气过程作为典型个例,反演了全过程的AOD和能见度变化,分析了两者之间的关系。结果表明:(1)由MODIS遥感数据反演的AOD值与地面实测AOD值变化趋势均呈“单峰型”,但由于存在观测时间的偏差,总体上反演值高于实测值;(2)利用AOD反演值得到的能见度值与实际能见度观测值基本吻合,两者的时空变化趋势基本一致,两者之间的相关系数达到0.6(P<0.01),符合此次霾过程的实际发生特征.
中文关键词:  MODIS  气溶胶光学厚度(AOD)  能见度反演
 
Visibility Inversion of a Haze Process in Beijing by Remote Sensing Based on MODIS Satellite Observations
Abstract:In order to ascertain the influence of haze weather on road traffic and provide a technological support for the monitoring of traffic meteorological disasters, in this paper, MODIS_L1B data (MOD02_1KM-Collections 6) was used to inverse the air aerosol optical thickness (AOD) and the road visibility of a great haze weather event occurred in Beijing from March, 6th to March 11th in 2012 combined with the retrieved data of AOD from AERONET (Aerosol Robotic Network) of NASA in USA, the observed data of visibility from the Ground Meteorological Observation Stations Network in Beijing and the observed data of visibility from the Road Automatic Weather Monitoring Stations Network and the relationship between the AOD and the visibility in this event was analyzed. The results showed as follows: (1) Both of the retrieved AOD values from MODIS remote sensing and the ground observed values of AOD from AERONET had a change tendency of a single peak type. But the AOD inversion values were higher than the observed values for the deviation of observed times. (2) The visibility values calculated by the retrieved AOD values was basically consistent with the observed values, both the temporal and spatial variation trends were basically consistent and the correlation coefficient between the two large than 0.6 (P<0.01). All of these inversions and calculation was consistent with the actual occurrence characteristics of this haze event.
keywords:haze  MODIS (moderate-resolution imaging spectrometer)  aerosol optical thickness (AOD)  visibility inversion
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